What is the distance from the moon to the point between Earth and the Moon where the gravitational pulls of Earth and Moon are equal?
The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the distance between Earth and the Moon is 3.84 × 108 m, and G = 6.67 x 10-11 N•m2/kg2.
A) 3.45 × 108 m
B) 3.83 × 107 m
C) 4.69 × 106 m
D) 3.83 × 106 m
E) 4.69 × 107 m
B
You might also like to view...
If Sirius transits my local meridian tonight at 6:43 PM, when will it transit tomorrow?
What will be an ideal response?
What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m?
A. 0.18 T B. 0.11 T C. 0.15 T D. 0.13 T E. 0.23 T
If a ball at the end of a string is whirled in a vertical circle at constant speed, the tension will be
A. the same throughout the motion. B. greatest at a point where the string is instantaneously parallel to the ground. C. greatest at the lowest point in the motion. D. greatest at the highest point in the motion.
Consider a flat plate or a plane wall with a thickness L and long cylinder of radius r0. Both of these are made of materials such that they can be treated as lumped capacitances (Bi<0.1). Show that in each case, the characteristic length ? c, defined as ? c=(V/As), can be approximated as (L/2) and (r0/2) respectively.
GIVEN • Plane wall with a thickness L • Long cylinder of radius r0 • Both cylinder and plane wall can be treated as lumped capacitances (Bi<0.1) SHOW • Characteristic length can be approximated as (L/2) and (r0/2) respectively. ASSUMPTIONS • Both plane wall and cylinder can be treated as lumped capacitances